Bobbin hanger



1951 R. G. HILBERT 2,565,429

BOBBIN HANGER Filed May 4, 1950 3O 3 INVENTOR.

Rich d a. Hilbert Patented Aug. 21, 1951 BOBBIN HANGER Richard G. Hilbert, Smithfield, R}. I., assignor to Universal Winding 00., Cranston,.R. 1., a corporation of Massachusetts Application May 4, 1950, Serial No. 159,954

. The present invention relates to a bobbin hanger and more particularly relates to a bobbin hanger provided with locking means to prevent yarn from being unwoundfrom the bobbin supported thereby.

In the following specification and claims the term yarn is employed in a general sense to apply to all kinds of strand materials, either textile or otherwise, and the designation package" is intended to mean the product of the winding machine whatever its form.

. One type of winding machine in common use today is known as a drum winder, and one of its principal uses is in connection with a twisting spindle to form a unit known as an uptwister. Drum winders comprise a driving roll or drum which is rotated at a constant speed and which is adapted to be contacted by the periphery of a bobbin or the surface of the package of yarn being wound thereon to rotate said bobbin and wind the desired package of yarn. The bobbins are customarily held in contact with the driving drum. by means of a bobbin hanger comprising a pair of spaced arms or a yoke pivoted at one end and carrying a bearingat their other end which rotatably journals the gudgeons of a bobbin. The arms or yoke are adapted to be pivoted towards and away from the driving roll to bring a bobbin thus journaled against the drum and hold it in position thereon while winding takes place, and swing the bobbin away from the drum and hold it disengaged therefrom.

It is common practice in textile mills when an end of yarn being wound on a drum winder breaks, or a package is wound to size, to immediately pivot the bobbin hanger away from the driving drum and out of contact therewith to prevent damage to the wound yarn. When the bobbin is moved out of engagement with the driving roll the operator of the machine may repair the yarn break immediately, or replace the full bobbin with an empty one, and start the unit winding again. It frequently happens that the machine operator is engaged with other duties and cannot immediately place the unit back in operation. When this'happens the full or partly full bobbin of yarn may go unattended for an appreciable length of time. It frequently happens that drum wrap occurs in connection with these unattended bobbins, i. e. the end of yarn I hanging from a bobbin becomes caught on or otherwise entangled with the driving drum, or its shaft, in such a manner that rotation of said drum unwinds yarn from the bobbin onto said drum or shaft. An appreciable amount of Yam :4 Claims. (Cl. 242-48) is lost in this manner, a considerable length of the machine operator's time is consumed in clearing the driving drum and/or its shaft of this yarn, and often the driving drum is injured either from the pressure ofthe yarn wound thereon or the operators efforts to remove it.

It is, therefore, one object of the present invention to provide a bobbin hanger for a drum winder that will prevent drum wrap.

Another object of the present invention is to provide a bobbin hanger that is capable of looking a bobbin journaled therein against rotation in an unwindingdirection.

Another object of the present invention is to provide a bobbin hanger with locking means adapted to look a bobbin journaled therein against rotation in an unwinding direction and which automatically releases said bobbin when it is rotated in a winding direction.

Other objects of the invention will in part be obvious and. will in part appear hereinafter.

The invention accordingly comprises the apparatus possessing the construction, combination of elements and'arrangements of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawing wherein:

Figure l is a somewhat diagrammatic side view of one arm of a bobbin hanger incorporating the present invention showing said arm in the lowered position it assumes when the bobbin, or the yarn wound thereon, is in contact with the driving drum;

Fig. 2 is a View similar to Fig. 1 but showing the bobbin hanger in elevated position to remove the bobbin, or the yarn wound thereon, from contact with the driving drum;

Fig. 3 is a view similar to Fig. 2 but showing the bobbin gudgeon locked against rotation in an unwinding direction;

Fig. 4 is an enlarged detailed side view of the locking means; and

Fig. 5 is an end view of the locking means.

The present invention comprises a bobbin hanger for use on winding machines of the drum.

driven type wherein the package of yarn being wound is rotated by peripheral contact with a driving roll or drum. The bobbin hanger comprises a yoke orinterconnected pair of arms pivoted adjacent one end to permit the other end faces when the bobbin is rotated in an unwind:-

ing direction to thereby effectively prevent such unwinding rotation, or break the yarn if such; unwinding rotation is being causedby'yarn-being' pulled from the bobbin. The rotating c1ampingmembers preferably comprise a circular disc mounted for rotation around an eccentric axis,

which passes through eccentrically located hole 34 in said disc. It will be seen that disc 30 is in effect a cam which will normally be positioned on arm in in the manner shown in Figs. 2 and 4 due to the greater weight of the high point tending to rotate downwardly. A stop 36 is formed on disc 3!! by making a diagonal cut in said disc andfbending the: disc over atone side of the cut. Sto 36 is so positioned on disc'30 that it will engage the under side of arm It] to prevent said 1 disc from rotating in a counterclockwise direction. as viewed in Figs. 1, 2 and 3, into clamping 7 position when the bobbin is rotated in a winding direction.

' -V Jhen disc 30 is in its normal position, i. e.

with its high point pointing downward, the dis- 1 tance between its periphery and bearing surthe amount of eccentricity of said axisbeing greater than the clearance between the bobbin gudgeon and the bearing surface. "The bobbin gudgeons are supported on the low portion of the. eccentric disc and rotation of said gudgeons in an unwinding direction rotates said disc to cause it to cam the gudgeons against the bearing surfaces to clamp them against further rotation. Rotation of th gudgeons in a winding direction rotates the discs back to their initial position and frees the bobbin.

Referring now to the drawing there is shown one arm is of a bobbin hanger pivotally mounted atone end by a pintle l2 to a convenient part of a drum winder to permit the bobbin hanger to be pivoted downwardly towards and upwardly away from the driving roll it of said winder. It will be understood that the bobbin hanger of the present invention is comprised of two similar but opposite arms pivoting upwardly and downwardly as a unit and cooperating to support a bobbin l3 between them by means of its gudgeons it. The other end of arm I is provided with a bearing surface it adapted to engage bobbin gudgeon IS, in the manner shown in Fig. 1, and provide a journal therefor when bobbin I3 is in engagement with driving drum ll. Arm H) has a channel It! formed therein to provide access means for bobbin gudgeons l into'and out from bearing surface id to load and unload the bobbin hanger.

'Bearing surface H5 is formed in a lip extending from a cylindrical plug 22 mounted in an opening adjacent the free end of arm l0 and.

held therein by meansof clamping screw 24 which draws the split ends 26 and 28 of arm 10 together. Plug 22, from which bearing surface I4 is formed, is preferably one of the oil impregnated sintered bearing metals, but it will be understood that it can be any appropriate material capable of providing a bearing surface. The inwardly facing end of plug 22 is positioned on arm H3 so that it is spaced from the corresponding plug in the second arm of the'bobbin hanger a distance substantially equal to the length of bobbin E3 to be carried thereby and its gudgeons 1%. It will, therefore, be seen that plug 22 in addition to providing bearing surface H which journals the bobbin for rotation also acts as a thrust'bearing to'maintain the longitudinal alignment of the bobbin with the drive rolland other parts of themechanism.

The lower end of channel [8 opposite bearing surface l4 flares outwardly to form an enlarged opening beneath said bearing surface. A cIamp ing disc 39 is rotatably mounted in the enlarged portion of channel 18' by means of pivot pin 32" face l4 is slightly greater than the diameter of gudgeon It. When the bobbin hanger is lowered to bring bobbin l3 into contact with driving roll ii said driving rollsupports the bobbin vertically and permitsslight'relative movement between the bobbin gudgeon l6 and the bobbin hanger to bring bearing surface M into contact with said gudgeon in the manner disclosed in Fig. 1. When the bobbin hanger is lifted, preferably by means of finger piece 38, the above mentioned relative motion is reversed and bobbin gudgeons lfileave bearing surface l4 and engage clamping disc 30 which supports them and bobbin 13 in the manner disclosed in Fig. 2. If the end of yarn hanging from the bobbin should catch on the driving drum, or any other moving part of the machine, the' attendant unwinding of said yarn will rotate gudgeon [6 in a counterclockwise direction, as seen in Fig. 2 and cause it to rotate clamping disc 30 in a clockwise direction causing the high point of said disc to clamp gudgeon [6. between itself and bearing surface I4. to prevent further rotation of bobbin [3 and cause the caught yarn to break.

The present invention has been described in connection with a bobbin hanger wherein clamping discs 30 are provided on both arms of the hanger. It will be appreciated that it may be desirable to provide only one arm of a hanger with such a clamping disc, the other arm being provided with a suitable stationary support to carry its gudgeon whenthe hanger is lifted.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be 'interpreted'as illustrative and not in a limitingsens'e.

What'is'cl'aimed is:

1. A bobbin hanger for use in winding machines comprising apivoted arm adapted to be pivoted from a winding position to a nonwinding position, a bearing surface adjacent one end of'said arm adapted to journal a bobbin gudgeon when said armis'in said winding position, and an eccentrically pivoted locking memper in opposed spaced relation to said bearing surface, said locking member being adapted to support said gudgeon when saidarm is in said nonwinding position and to be rotated thereby when the bobbin is rotated in a direction to unwindthe yarn woun'dfthereon to clamp said gudgeon between saidl'ocking member and said 5 pivoted from a winding position to a nonwinding position, an arcuate bearing surface adjacent one end of said arm adapted to journal 2. bobbin gudgeon when said arm is in said winding position, and an eccentrically pivoted disc in opposed spaced relation to said bearing surface, said disc being adapted to support said gudgeon when said arm is in said nonwinding position and to be rotated thereby when the bobbin is rotated in a direction to unwind the yarn wound thereon to clamp said gudgeon between the periphery of said disc and said bear ing surface to prevent unwinding of said yarn.

3. A bobbin hanger for use in winding machines comprising a pivoted arm adapted to pivot downwardly into winding position and upwardly into nonwinding position, a downwardly facing arcuate bearing surface adjacent one end of said arm adapted to journal a bobbin gudgeon when said arm is in said winding position, and an eccentrically pivoted disc in opposed spaced relation to said bearing surface, said disc being adapted to support said gudgeon when said arm is in said nonwinding position and to be rotated thereby when the bobbin is rotated in a di rection to unwind the yarn wound thereon to clamp said gudgeon between the periphery of said disc and said bearing surface to prevent unwinding of said yarn.

4. In a winding machine of the type having a rotatable drum adapted to support and rotate a bobbin to cause of yarn to be wound thereon the combination comprising a pivoted bobbin supporting arm adapted to pivot a bobbin downwardly into contact with said drum and upwardly out of contact with said drum, a downwardly facing bearing surface adapted to journal a bobbin gudgeon when the bobbin is in contact with said drum, and an eccentrically pivoted disc in opposed spaced relation to said bearing surface, said disc being adapted to support said gudgeon when the bobbin is out of contact with said drum and to be rotated by said gudgeon when the bobbin is rotated in a. direction to unwind the yarn wound thereon to clamp said gudgeon between the periphery of said disc and said bearing surface to prevent unwinding of said yarn.

RICHARD G. HILBERT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,684,114 Saal Sept. 11, 1928 Certificate of Correction Patent N 0. 2,565,429 August 21, 1951 RICHARD G. HILBERT It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 2 line 24 for arran ements read armn ement' column 6 line 3 7 7 3 5 after cause msert a stm/nd and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Oflice. Signed and sealed this 25th day of December, A. D. 1951.

THOMAS F. MURPHY,

Assistant Commz'ssioner of Patents. 

